/*******************************************************************************
 * Copyright 2010 DemandSpot
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.demandspot.aws.sqs;

import com.xerox.amazonws.sqs2.Message;
import com.xerox.amazonws.sqs2.MessageQueue;

public abstract class SqsMessageHandler {
	protected enum Action {DeleteMessage, Continue};
	private MessageQueue queue;
	
	public MessageQueue getQueue() {
		return queue;
	}
	
	void setQueue(MessageQueue queue) {
		this.queue = queue;
	}
	
	/**
	 * This method is being called by the SqsMessagePoller before polling messages
	 * 
	 * @return true to continue with the polling, false otherwise
	 */
	public boolean doBeforePoll() {
		return true;
	}
	
	public abstract Action handleMessage(Message message);

	public void onQueueEmpty() {
	}
}
